Nailing-machine.



No. 822,867. PATENTBD JUNE 5, 190e. n

A. F. PRESTON.

NAILING MACHINE.

APPLICATION FILB 0UT.13.1900

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PATENTED JUNE 5, 1906.

A. F. PRESTON. NAILING MACHINE.

APPLIGATION FILED 04312151.1900.

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the shaft 24, a roll 42 being mounted upon said )in to reduce friction. Upon examining ll 1g. 5 it will be seen that the rotation of the shaft 24 through the medium of the eccentric-pin 41 effects a reciproeation of the head or carrier 3S. The lower portion of the carrier laterally extended and projects beneath the guides 3Q 39, as shown in Fig. 5. In the lower end of the carrier there is formed a recess the end walls of which are in the form of a quadrant. vln said recess are placed two jaws 43 43, which jaws are pivotally supported upon studs 44. The outer ends of said jaws are fitted to slide in curved grooves formed by the pivots 44 and the end walls of the recess, said end walls being concentric to the pivots 44.

When the aws are in the )osition shown in Fig. 7, they are flush. with the bottom face of the driving-head. The ivots 44 are cut away and the apertures which receive them are formed in the edges of the jaws, said jaws, however, being held in operative position with relation to each other and to the )ivots by the curved walls of the recess 45. Fach aw is formed with a groove 46 and with a sharp cuttilig edge 47, said edge being formed at the junction of the bottom of the groove 46 and the face 48 of the jaw. The said edge is located in a plane which passes directly through the axis of motion of the jaw, so that when the jaws occupy the position shown in Fig. 7, with. the faces 48 in alinement or lying in. the same plane, the cutting edges just meet. They are normally held yieldingly in that position by pins 49, arranged in sockets in the head or carrier, there being in said sockets s rings 50. The pins 49 enter notches 51 in t 1e outer ends of the jaws, as best shown in Figs. S and 13. The bottom faces olI the jaws are cut away at one edge, as shown at 52, (see Fig. 1 1,) whereby they are adapted to engage the. llange of one of the feeding-wheels, as shown in Fig. 5, near the lower extreme of movement of the head, so that said jaws may be forced into cutting position. Through the head there is an aperture to receive the wire from which the nail or slug is formed. Said wire is indicated at 54, and it passes around a reel 55, having trunnions loosely journaled in uprights 561 on the top of the vframe The wire is passed downward through the aperture and out between the jaws,(lying in the groove 46 therein,) and the cutting edges of said jaws yieldingly engage the wire by reason of the pressure against their outer edges of the spring-pressed pins 49.

Wlhen the head or carrier descends, the jaws engage the wire sufficiently to feed it downward and to force it into the work therebeneath. As soon as the jaws, however, engage the work or their eut-away portions 52 engage the feeding-disk or any other i suitable stop the further descent. ol' the head l saase'? or carrier forces the cutting edges toward each other as the aws swing about the pivots 44, and said cutting edges nip or sever the wire. As the head rises it is necessary that some device be provided to prevent the retrograde movement of the wire, and hence ,l provide an automatic locking device, as shown in Figs. 15, 16, and 17. It consists of a finger 5.), l'ulcrumed upon a pin 5G, passed through a block 57, arranged in a groove in the )late 37. A weight 58 is on the outer end of the 'linger and holds the inner end against the wire 54. The finger yields to permit thel wire to move downward past it, but on the slightly retrograde movement of the wire firmly grips it against the end of the frame, as shown in Fig. 15, and locks it against further movement.

From this description it will be seen that as the driving-head or carrier reciprocates the jaws operate to force the ends of the wire into the work, feeding it at the same time, and also to sever the said end. By reason of these three functions performed by the jaws I sometimes term them Ha combined driving and severing mechanism, or a combined feeding and severing mechanism, or combined feeding and driving mechanism.

The stop and clutch mechanism is so constructed and arranged that when the machine is at rest the driver is at its upper extreme of movement, and during one rotation of the shaft the carrier o1' driving-head is moved downward to its lower extreme of movement and then upward to its original position.

Any suitable mechanism may be utilized to support the work, and likewise any suitable mechanism may be employed for feeding it beneath the reciprocatory head. vFor many reasons .l prefer to employ those which are illustrated on the drawings and which. l shall now proceed to describe.

Referring to Fig. 3, reference-miniera] 5G indicates a post which is threaded at its lower end to receive a substantially spherical nut 57, which rests in a socket 58, forming the upper part of a laterally-extending projection on the standard 20. The lower end of the post projects downward. into an aperture 5E), which permits the upper portion of said post to be swung outwardly. A pin GU, which is held outward by a spring (il, has a web projecting into a groove in the post and holds said post` yieldingly upright and lirmly against rotation. The provision of the spherical nut permits an adjustment of the post and also permits it to swing outwardly. Placed loosely upon the post is a sleeve 62, having at its end a head which is milled or toothed, as shown in` Fig. 18. Between the end of the post and the head there is placed a cushioning-spring 63. I denominate the post and the sleeve the work-support," and I likewise include the head and the sleeve in the work-feeding mechanism. 0n the lOO movement of the wire, and provisions whereby the work may be introduced into the path of the said wire end.

2. A machine of the character described comprising a combined wire feeding, driving and severing mechanism for Jfeeding, driving and severing a nail from a wire, said mechanism consisting of a driver having two coacting vmembers .movable relatively to said driver, and whlch are adapted to engage the wire and to be so moved by reason of resistance of the wire, and which when so moved bite into the wire, and a work-support in operative relation to said mechanism.

3. A machine of the character described comprising a movable carrier and springpressed j aws thereon for automatically gripping, engaging and driving a smooth wire into the work, and severing the driven end, means in consequence of which said jaws are operated, and a work-support in operative relation to said aws.

4. A machine of the character described comprising a movable carrier and a pair of coacting members thereon for driving the end of a wire into the work, one of said members being movable toward and from the other member and having a cutting edge adapted to engage the wire and press it against said other member and to sever it, and being so olperated to some extent by the resistance to t 1e penetration of the end of the wire.

5. A machine of the character described comprising a movable carrier, means for actuating said carrier, complemental wire drivlng and severing jaws movably mounted on said carrier and. adapted to engage and drive a wire into the work and to be moved to sever the driven end without the direct actuation of said jaws by said actuating means but in consequence of the actuation of the carrier, and a work-suj'iport in operative relation to said jaws.

6. A machine of the character described comprising a movable carrier, and yielding wire driving and severing aws thereon, adapted to drive a wire into the work and to sever the driven end, said jaws being operated to some extent by the resistance to the movement of the wire.

7. A machine of the character described comprising a movable carrier, an actuator for said carrier, complemental cuttingjaws on said carrier through which the wire may pass, said jaws being adapted to force the wire into the work, means independent of said actuator and coacting with the same for causing said jaws to sever the wire, and a work-support in operative relation to said jaws.

8. A machine ol' the character described comprising a movable carrier, complemental cutting-jaws supported on said carrier and movable relatively thereto and adapted to engage and drive a wire into the work, and a l work-support having a stop adapted to cause said cutting-jaws to move relatively to said carrier to cause them to sever the wire.

9. A machine having a throat for the passage of a wire, a device movable relatively to the wall of said throat and adapted to coperate therewith to hold the wire against retrograde movement, a reciprocatory carrier movable toward and from the work, means lor actuating said carrier, and coacting members on said carrier having cutting edges movable toward and from each other and which during the movement of the carrier toward the work are caused to engage and drive a wire into the work and which are so moved by contact with the work to sever the driven end and to point the wire from which the end was severed.

10. A machine having a throat for the passage ol a wire, a device to hold the wire against retrograde movement, grippers Inovable toward the work to drive the end of a wire into the work and away from the work to take a fresh grip on the wire, said grippers having cutting edges to sever the driven wire and operating by reason of resistance to the movement of said wire, and a work-support in operative relation to said grippers.

l l. A machine ol the character described, comprising a support for the work, a movable member movable toward and from the support, means lor actuating said member, and jaws mo'vably supported on said member and which are adapted to grip a wire so that said member causes them to drive the end of the wire into the work, and which are adapted to engage the work and be caused by engagement with the work to cease driving the wire and to move relatively to said movable member to sever the driven end.

A machine of the character described comprising a support for the work, a member movable toward and from the support, and means carried by said member and being movable relatively thereto, to engage and grip wire and drive it into the work, said gripping means also operating to engage said work and to be moved thereby upon the carrying member to sever the wire flush. with the work.

13. A machine of the character specified comprising a support for the work, a carrier movable toward and from the work, and two jaws supported on said carrier and `having cutting edges which extend toward each other, said jaws being operated to sever the wire in. part by the resistance of the work to the movement ol said jaws, and a stop for completing the severing operation of the jaws.

14. A machine of the character specified comprising a support for the work, a carrier movable toward and from the work, and two jaws curved in the direction of their length and having cutting edges on their ends, said IOO ICS

IIO

carrer having curved sots to receive seid jews.

15. In e machine of the character scribed, means for driving and severing wire, Said Ineens comprising jaws e0}mra/inl dev' in consequence of Wleh sar jews ing with the wire to effect a driving grip erepeete. Y thereon en operebe by eentaet with the testimony whereof I beve eed my Work te bite through the Wire, means for mt sgnatllre in presence of tvv@ Witnesses. parting e, drvnf motion to the jews, and e ALBERT F. PRESTON. Werk-rest for hodng the Work in position te tneeses: arrest ne seid. jews. Y E MARCUS B, Mer,

l. A mecne of the character described 'i Veeripreingg' a. eombined driving and severing meehenem having two spring-pressed levvs de! ede tef te drive the end of e Wire inte the the 3 Wer; ami Vsever the wire between hem and 

